Re: [Qemu-devel] [PATCH v3] hw/arm/virt: Add high MMIO PCI region

[Pavel Fedin <p.fedin@samsung.com>]

 Hello!

> this is wrong since dword is too small for values of high memory
> use aml_qword_memory() instead

 Thanks, will fix it.

> since window is at fixed position and it's not possible for guest to
> move base address of the range, make AddressMaximum the same as AddressMinimum i.e.

 But it is anyway not possible. On ARM hardware PCI range addresses are normally hardwired (at least
on simple machine which we are emulating), and the OS doesn't have control over it. And i'm not sure
whether some hotplugged memory can be overlaid on top of it. This is because on PC PCI is a core
system bus, which represents all address space, and RAM is kind of plugged into it. On ARM another
buses are used for system core, and PCI controller, from the point of view of that bus, is a single
device, which occupies some space. So AFAIK having something else on top of PCI hole on ARM would be
abnormal.

Kind regards,
Pavel Fedin
Expert Engineer
Samsung Electronics Research center Russia